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在我国西南、西北一些在建和拟建的大型水电枢纽工程区，大量的工程地质调查表明，这些地区浅层岩体的表生改造相当发育，它们对岩体的工程地质特性及斜坡岩体的稳定性有显著的影响．本文在现场地质调研的基础上，对一由花岗岩构成的坝区所产生的上述现象作了详细的研究，探讨了岩体结构表生改造的力学机制和典型鉴定特征，建立了相应的地质力学模型，并对表生改造对岩体工程地质特性的影响作了简要讨论．
A large number of engineering geologic surveys in some large-scale hydropower projects under construction and proposed in southwest and northwest China show that the superficial alteration of shallow rock mass in these areas is quite developed. They are of great significance to the engineering geological characteristics of rock mass and the slope rock mass The stability has a significant impact. Based on the field geological survey, this paper makes a detailed study on the above phenomenon caused by a granite dam, discusses the mechanics mechanism and typical identification features of epikarst alteration in rock mass structure, and establishes corresponding geomechanics Model, and briefly discusses the influence of superficial remodeling on the geologic characteristics of rock mass.